net: cdc_ncm: return proper error if setup fails

Most setup errors are ignored to ensure maximum firmware
compatibilty.  But GET_NTB_PARAMETERS and the functional
descriptors are required.  Use proper error codes and
log level if these fail.

Cc: Alexey Orishko <alexey.orishko@gmail.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 62dcb2e..f168bc8 100644 (file)
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -86,8 +86,8 @@ static u8 cdc_ncm_setup(struct usbnet *dev)
                              0, iface_no, &ncm_parm,
                              sizeof(ncm_parm));
        if (err < 0) {
-               dev_dbg(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
-               return 1;
+               dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
+               return err; /* GET_NTB_PARAMETERS is required */
        }
 
        /* read correct set of parameters according to device mode */